Looks like a standard airbox set up to me. It is unusual for a bike like this to come with absolutely nothing. Are there any jets?? You’ll need a few of those for sure.

Wheels, yes. That could be an issue. If you’re lucky, they may be NXA, but don’t think they will be to be honest because the swingarm pre-dates the NXA model by a couple of years. I've already asked Spondon about wheels. Guess where that got me..

All that aside, if the price is right for you, buy it and sort the details out later.